Automatic stop-valve.



F. T. REID. AUTOMATIC STOP VALVE.

PrLIouIoN Hmm AUG. 5. 1907.

No. 882,798. i PATENTED MAR. 24, 1908.

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FRANK REID, OF KANSAS CITY, MISSOURI.

AUTOMATIC STOP-VALVE.

Specification of Letters Patent.

Patented March 24, 1908.

Application filed. August 5, 1907. Serial No. 387,184.

To all whom it may concern:

Be it known that I, FRANK T. REID, a citizen of the United States, residing at Kansas City, in the county of Jackson and State of Missouri, have invented certain new and use* ful Improvements in Automatic Stop-Valves, of which the 'following is a speciiication.

This invention relates to automatic stop valves; and my object is to provide a valve to be connected to a gas-supply pipe so that should the supply of gas be materially reduced or temporarily cut oil while the cocks of the burners are open, the valve closes and prevents any gas passing to the burners, should the supply again be turned on, until the valve is set by hand.

Referring now to the accompanying drawing which illustrates the invention: Figure 1 represents a front elevation of my improved valve. Figs. 2 and 8 represent side and plan views of the same, respectively, Fig. 4 is a vertical seotion on line IV-IV of Fig. 2.

The valve may be placed in a cellar or any other convenient portion of the building, and is preferably connected to the gas -supply pipe at a point adjacent the meter. The valve consists of a casing 1 preferably of the globe-valve type, having an inlet 2 and an outlet 3 divided by a partition 4 having openings in its horizontal portions, the beveled walls of the openings forming valve-seats 5.

6 designates a chamber in the upper portion of the casing which is normally in communication with inlet 2 and outlet 3, so that gas passing through the valve will enter the chamber and normallyhold a piston, hereina'fter described, in a raised position. Chamber 6 is closed at its upper end by a screw-cap 7, so that access may be had to the interior thereof when desired.

The piston, above referred to, consists of a piston-head 8 and a tubular stem 9, the former of which is reciprocably mounted in vthe chamber, a ground joint being formed between the inner surface of the chamber and the periphery of the piston-head to prevent leakage of gas around the latter. Tubular 'stem 9 is provided with two valves 10 11 having beve ed walls to snugly lit the valveseats 5 when the piston occupies its lowermost position, as shown in Fig. 4, to prevent the gas from Iiowing through the valve. The tubular stem 9 is provided with oppo sitely-disposed inlet ports 12 and 13 arranged immediately above and below plugs 10 and 11, respectively. It is also provided with oppositely-disposed outlet ports 14 immediately above plug 11, see Fig. 4, for a purpose hereinafter described.

15 designates a stem slidably arranged'in the tubular stem and provided near its lower portion with a'peripheral groove 16 and near its upper portion with an outlet 17. It is also provided near its intermediate portion with oppositelydisposed outlet ports 18, which communicate with a central counterbore 19 extending downwardly to the lower terminal of the stem. The upper portion of stern 15 extends through a stuffing-box 20, and is provided at its upper end with a head 21 having a pair of oppositely-disposed lugs 22, which normally rest upon the tubular eX- tension 23 of a packing-nut 24, Jformi-ng part ol the stuffing-box, which latter extends upwardly from the central portion of cap 7.

Extension 23 has two oppositely-disposed slots 25 to receive lugs 22 when stem 15 and its head are turned one-fourth of a revolution. When thus turned the stein is depressed, until lugs 22 abut against the lower ends of slots 25, by an expansion spring 26 abutting at its upper end against the stufling-box and at its lower end against a shoulder 27, formed on the stem by reducing its upper portion.

When the valve is in the closed position shown in Fig. 4, any gas entering inlet 2 will pass through inlets 12, ascend the counterbore 19, and escaping into the upper portion of chamber 6 through outlets 18, will press upon the piston-head and reliably hold the valves 10 and 11 to their seats.

Vhen it is desired to reset the valve, this operation is accomplished by turning head 21 until lugs 22 coincide with slots 25. Spring 26 will then force stem 15 downward until lugs 22 reach the lower ends of the slots. The depression of stem 15 brings outlet 17 into communication with the upper portion of chamber 6. It also shuts off inlets 12 and brings groove 16 into communication with inlets 13 and outlets 14, so that the gas may pass into the lower portion of chamber 6 and force the piston up, the gas from the upper portion of the chamber in the meantime escaping. through outlet 17. y j

The upward movement of the piston uncovers the opening in partition 4 sothat the gas may low therethrough in sufficient quantity to hold the piston in an elevated position. Stem 15 is then raised to its normal position where it is held by the lugs 22 until an interruption of the flow of gas necessitates resetting the valve.

Having thus described my invention, what I claim is 1. An automatic valve consisting of a casing having inlet and outlet openings and a chamber communicating therewith, a tubular stem having valves for closing communication between the openings, said stem having inlet and outlet ports 13 14 communicating respectively with the inlet opening and the chamber, means within the tubular stem for opening and closing communication between ports 13 14, and fluid pressure operable means reciprocably arranged withinthe chamber for actuating the tubular stem.

2. An automatic valve consisting of a casing having inlet and outlet openings and a chamber communicating therewith, a tubular stem having valves for closing communication between the openings, said stem having inlet and outlet ports 13 14 communicating respectively with the inlet opening and the chamber, means within the tubular stem for opening and closing communication between ports 13 14, and a iiuid pressure operable piston-head reciprocably arranged within the chamber for actuating the tubular stem.

3. An automatic valve consisting of a casing having inlet and outlet openings and a chamber communicating therewith, a tubular stem having valves for closing communication between the openings, said stem having inlet and outlet ports 13 14 communicating respectively with the inlet opening and the chamber, a stem within the tubular stem for opening and closing communication between ports 13 and 14, and fluid pressure operable means reciprocably arranged within the chamber for actuating the tubular stem.

4. An automatic valve consisting of a casing having inlet and outlet openings and a chamber communicating therewith, a tubular stem having valves for closing communication between the openings, said stem having ports 12 communicating with the inlet opening, a fluid pressure operable piston-head reciprocably arranged within the chamber for actuating the tubular stem, and means within the tubular stem for opening and closing communication between ports 12 and the upper portion of the cham- 5. An automatic valve consisting of a casing having inlet and outlet openings and a chamber communicating therewith, a tubular stem having valves for closing communication between the openings, said stem having ports l2 communicating with the inwithin the chamber-for actuating the'tubular stem, and a slidable stem within the tubular' stem adapted when in its lowermost position to close ports 12 and provided with a counterbore and a port whereby communication is established between ports 12 and the upper portion of'the chamber when said slidable stem occupies its lowermost position..

6. An automatic valve consisting of a casing having inlet and outlet openings and a chamber communicating therewith, a tubular stem having valves for closing communication between the openings, said stem having ports 12 13 and 14, fluid pressure operable means within the chamber for actuating the tubular stem, and a movable stem 15 within the tubular stem having a peripheral groove for establishing communication between ports 13 14 and an outlet 17 for establishing communication between the chamber and the exterior of the valve when stem l5 occupies its lowermost position, said stem 15 also having a counterbore 19 and outlets 1S for establishing communication between ports 12 and the chamber when the stem occupies its uppermost position.

7. An automatic valve consisting of a casing having inlet and outlet openings and a chamber communicating therewith, a tubular stem having inlet and outlet ports 13 14 communicating respectively with the inlet opening and the chamber, fluid pressure operable means within the chamber for actuating the tubular stem, a stem within the tubular stem for opening and closing communication between ports 13 14, and means for normally supporting the inner stem in a raised position.

8. An automatic valve consisting of a casin having inlet and outlet openings and a cham er communicating therewith, a tubular -stem having inlet and outlet ports 13 14 communicating respectively with the inlet opening and the chamber, fluid pressure operable means within'the chamber for actuating the tubular stem, a stem within the tubular stem for opening and closing communication between ports 13 14, means for normally supporting the inner stem in a raised position, and expansive means for depressing said stem,

In testimony whereof I affix my signature,

in the presence of two witnesses.

FRANK T. REID,

Witnesses:

F. G. FISCHER, LESLIE E. BAIRD,

letv opening, fiuid pressure operable means 

